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Call it once at startup, then use the returned function in your framework's middleware\u002Fhook system.",[599,600,606],"pre",{"className":601,"code":602,"filename":603,"language":604,"meta":605,"style":605},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createAuthMiddleware } from 'evlog\u002Fbetter-auth'\n\nconst identify = createAuthMiddleware(auth, {\n  exclude: ['\u002Fapi\u002Fauth\u002F**', '\u002Fapi\u002Fpublic\u002F**'],\n  include: ['\u002Fapi\u002F**'],\n  maskEmail: true,\n})\n","server\u002Fmiddleware\u002Fauth-identify.ts","typescript","",[591,607,608,641,648,673,709,730,744],{"__ignoreMap":605},[609,610,613,617,621,625,628,631,634,638],"span",{"class":611,"line":612},"line",1,[609,614,616],{"class":615},"s7zQu","import",[609,618,620],{"class":619},"sMK4o"," {",[609,622,624],{"class":623},"sTEyZ"," createAuthMiddleware",[609,626,627],{"class":619}," }",[609,629,630],{"class":615}," from",[609,632,633],{"class":619}," '",[609,635,637],{"class":636},"sfazB","evlog\u002Fbetter-auth",[609,639,640],{"class":619},"'\n",[609,642,644],{"class":611,"line":643},2,[609,645,647],{"emptyLinePlaceholder":646},true,"\n",[609,649,651,655,658,661,664,667,670],{"class":611,"line":650},3,[609,652,654],{"class":653},"spNyl","const",[609,656,657],{"class":623}," identify ",[609,659,660],{"class":619},"=",[609,662,624],{"class":663},"s2Zo4",[609,665,666],{"class":623},"(auth",[609,668,669],{"class":619},",",[609,671,672],{"class":619}," {\n",[609,674,676,680,683,686,689,692,694,696,698,701,703,706],{"class":611,"line":675},4,[609,677,679],{"class":678},"swJcz","  exclude",[609,681,682],{"class":619},":",[609,684,685],{"class":623}," [",[609,687,688],{"class":619},"'",[609,690,691],{"class":636},"\u002Fapi\u002Fauth\u002F**",[609,693,688],{"class":619},[609,695,669],{"class":619},[609,697,633],{"class":619},[609,699,700],{"class":636},"\u002Fapi\u002Fpublic\u002F**",[609,702,688],{"class":619},[609,704,705],{"class":623},"]",[609,707,708],{"class":619},",\n",[609,710,712,715,717,719,721,724,726,728],{"class":611,"line":711},5,[609,713,714],{"class":678},"  include",[609,716,682],{"class":619},[609,718,685],{"class":623},[609,720,688],{"class":619},[609,722,723],{"class":636},"\u002Fapi\u002F**",[609,725,688],{"class":619},[609,727,705],{"class":623},[609,729,708],{"class":619},[609,731,733,736,738,742],{"class":611,"line":732},6,[609,734,735],{"class":678},"  maskEmail",[609,737,682],{"class":619},[609,739,741],{"class":740},"sfNiH"," true",[609,743,708],{"class":619},[609,745,747,750],{"class":611,"line":746},7,[609,748,749],{"class":619},"}",[609,751,752],{"class":623},")\n",[588,754,755,756,759,760,762,763,766],{},"The function signature is ",[591,757,758],{},"(log, headers, path?) => Promise\u003Cboolean>",". It resolves the session, calls ",[591,761,596],{},", captures timing into ",[591,764,765],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[768,769,346],"h2",{"id":770},"options",[588,772,773,774,781],{},"Inherits all ",[775,776,778,780],"a",{"href":777},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[591,779,596],{}," options",", plus:",[783,784,785,804],"table",{},[786,787,788],"thead",{},[789,790,791,795,798,801],"tr",{},[792,793,794],"th",{},"Option",[792,796,797],{},"Type",[792,799,800],{},"Default",[792,802,803],{},"Description",[805,806,807,828,847,866],"tbody",{},[789,808,809,815,820,825],{},[810,811,812],"td",{},[591,813,814],{},"exclude",[810,816,817],{},[591,818,819],{},"string[]",[810,821,822],{},[591,823,824],{},"['\u002Fapi\u002Fauth\u002F**']",[810,826,827],{},"Route patterns to skip (glob).",[789,829,830,835,839,844],{},[810,831,832],{},[591,833,834],{},"include",[810,836,837],{},[591,838,819],{},[810,840,841],{},[591,842,843],{},"undefined",[810,845,846],{},"If set, only matching routes are resolved.",[789,848,849,854,859,863],{},[810,850,851],{},[591,852,853],{},"onIdentify",[810,855,856],{},[591,857,858],{},"(log, session) => void",[810,860,861],{},[591,862,843],{},[810,864,865],{},"Called after successful identification.",[789,867,868,873,878,882],{},[810,869,870],{},[591,871,872],{},"onAnonymous",[810,874,875],{},[591,876,877],{},"(log) => void",[810,879,880],{},[591,881,843],{},[810,883,884],{},"Called when no session is found.",[768,886,888],{"id":887},"skip-the-routes-that-do-not-need-a-session","Skip the routes that do not need a session",[588,890,891],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[599,893,895],{"className":601,"code":894,"language":604,"meta":605,"style":605},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[591,896,897,913,922,937,950,964,971],{"__ignoreMap":605},[609,898,899,901,903,905,907,909,911],{"class":611,"line":612},[609,900,654],{"class":653},[609,902,657],{"class":623},[609,904,660],{"class":619},[609,906,624],{"class":663},[609,908,666],{"class":623},[609,910,669],{"class":619},[609,912,672],{"class":619},[609,914,915,917,919],{"class":611,"line":643},[609,916,679],{"class":678},[609,918,682],{"class":619},[609,920,921],{"class":623}," [\n",[609,923,924,927,929,931,933],{"class":611,"line":650},[609,925,926],{"class":619},"    '",[609,928,691],{"class":636},[609,930,688],{"class":619},[609,932,669],{"class":619},[609,934,936],{"class":935},"sHwdD","     \u002F\u002F Better Auth itself\n",[609,938,939,941,943,945,947],{"class":611,"line":675},[609,940,926],{"class":619},[609,942,700],{"class":636},[609,944,688],{"class":619},[609,946,669],{"class":619},[609,948,949],{"class":935},"   \u002F\u002F Public endpoints\n",[609,951,952,954,957,959,961],{"class":611,"line":711},[609,953,926],{"class":619},[609,955,956],{"class":636},"\u002Fapi\u002Fhealth",[609,958,688],{"class":619},[609,960,669],{"class":619},[609,962,963],{"class":935},"      \u002F\u002F Health checks\n",[609,965,966,969],{"class":611,"line":732},[609,967,968],{"class":623},"  ]",[609,970,708],{"class":619},[609,972,973,975],{"class":611,"line":746},[609,974,749],{"class":619},[609,976,752],{"class":623},[588,978,979],{},"For high-traffic apps, flip the model and only resolve sessions on routes that need them:",[599,981,983],{"className":601,"code":982,"language":604,"meta":605,"style":605},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[591,984,985,1001,1029],{"__ignoreMap":605},[609,986,987,989,991,993,995,997,999],{"class":611,"line":612},[609,988,654],{"class":653},[609,990,657],{"class":623},[609,992,660],{"class":619},[609,994,624],{"class":663},[609,996,666],{"class":623},[609,998,669],{"class":619},[609,1000,672],{"class":619},[609,1002,1003,1005,1007,1009,1011,1014,1016,1018,1020,1023,1025,1027],{"class":611,"line":643},[609,1004,714],{"class":678},[609,1006,682],{"class":619},[609,1008,685],{"class":623},[609,1010,688],{"class":619},[609,1012,1013],{"class":636},"\u002Fapi\u002Fdashboard\u002F**",[609,1015,688],{"class":619},[609,1017,669],{"class":619},[609,1019,633],{"class":619},[609,1021,1022],{"class":636},"\u002Fapi\u002Faccount\u002F**",[609,1024,688],{"class":619},[609,1026,705],{"class":623},[609,1028,708],{"class":619},[609,1030,1031,1033],{"class":611,"line":650},[609,1032,749],{"class":619},[609,1034,752],{"class":623},[588,1036,1037,1039,1040,1042,1043,1046,1047,1050,1051,1053,1054,1056],{},[591,1038,834],{}," and ",[591,1041,814],{}," use glob patterns (",[591,1044,1045],{},"*",", ",[591,1048,1049],{},"**","). Provide both if you need granular control, and ",[591,1052,814],{}," wins over ",[591,1055,834],{},".",[768,1058,1060],{"id":1059},"react-to-identification","React to identification",[588,1062,1063,1064,1066],{},"Use ",[591,1065,853],{}," to react to user identification, for example to force-keep logs for premium users via tail sampling:",[599,1068,1070],{"className":601,"code":1069,"filename":603,"language":604,"meta":605,"style":605},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[591,1071,1072,1088,1115,1151,1178,1183,1188,1205,1230,1235],{"__ignoreMap":605},[609,1073,1074,1076,1078,1080,1082,1084,1086],{"class":611,"line":612},[609,1075,654],{"class":653},[609,1077,657],{"class":623},[609,1079,660],{"class":619},[609,1081,624],{"class":663},[609,1083,666],{"class":623},[609,1085,669],{"class":619},[609,1087,672],{"class":619},[609,1089,1090,1093,1095,1098,1102,1104,1107,1110,1113],{"class":611,"line":643},[609,1091,1092],{"class":663},"  onIdentify",[609,1094,682],{"class":619},[609,1096,1097],{"class":619}," (",[609,1099,1101],{"class":1100},"sHdIc","log",[609,1103,669],{"class":619},[609,1105,1106],{"class":1100}," session",[609,1108,1109],{"class":619},")",[609,1111,1112],{"class":653}," =>",[609,1114,672],{"class":619},[609,1116,1117,1120,1122,1125,1127,1130,1132,1135,1138,1140,1143,1145,1148],{"class":611,"line":650},[609,1118,1119],{"class":615},"    if",[609,1121,1097],{"class":678},[609,1123,1124],{"class":623},"session",[609,1126,1056],{"class":619},[609,1128,1129],{"class":623},"user",[609,1131,1056],{"class":619},[609,1133,1134],{"class":623},"plan",[609,1136,1137],{"class":619}," ===",[609,1139,633],{"class":619},[609,1141,1142],{"class":636},"enterprise",[609,1144,688],{"class":619},[609,1146,1147],{"class":678},") ",[609,1149,1150],{"class":619},"{\n",[609,1152,1153,1156,1158,1161,1164,1167,1170,1172,1174,1176],{"class":611,"line":675},[609,1154,1155],{"class":623},"      log",[609,1157,1056],{"class":619},[609,1159,1160],{"class":663},"set",[609,1162,1163],{"class":678},"(",[609,1165,1166],{"class":619},"{",[609,1168,1169],{"class":678}," _forceKeep",[609,1171,682],{"class":619},[609,1173,741],{"class":740},[609,1175,627],{"class":619},[609,1177,752],{"class":678},[609,1179,1180],{"class":611,"line":711},[609,1181,1182],{"class":619},"    }\n",[609,1184,1185],{"class":611,"line":732},[609,1186,1187],{"class":619},"  },\n",[609,1189,1190,1193,1195,1197,1199,1201,1203],{"class":611,"line":746},[609,1191,1192],{"class":663},"  onAnonymous",[609,1194,682],{"class":619},[609,1196,1097],{"class":619},[609,1198,1101],{"class":1100},[609,1200,1109],{"class":619},[609,1202,1112],{"class":653},[609,1204,672],{"class":619},[609,1206,1208,1211,1213,1215,1217,1219,1222,1224,1226,1228],{"class":611,"line":1207},8,[609,1209,1210],{"class":623},"    log",[609,1212,1056],{"class":619},[609,1214,1160],{"class":663},[609,1216,1163],{"class":678},[609,1218,1166],{"class":619},[609,1220,1221],{"class":678}," anonymous",[609,1223,682],{"class":619},[609,1225,741],{"class":740},[609,1227,627],{"class":619},[609,1229,752],{"class":678},[609,1231,1233],{"class":611,"line":1232},9,[609,1234,1187],{"class":619},[609,1236,1238,1240],{"class":611,"line":1237},10,[609,1239,749],{"class":619},[609,1241,752],{"class":623},[588,1243,1244,1245,1247,1248,1250,1251,1253],{},"Hooks fire after the session is resolved and ",[591,1246,596],{}," has set its fields. They run on every request that passes the ",[591,1249,834],{},"\u002F",[591,1252,814],{}," filter, so keep them fast and side-effect-free.",[1255,1256,1257,1262],"tip",{},[588,1258,1259,1260,682],{},"Common patterns for ",[591,1261,853],{},[1263,1264,1265,1269,1272],"ul",{},[1266,1267,1268],"li",{},"Force-keep audit logs for admins or high-value plans.",[1266,1270,1271],{},"Tag the request with feature flags or tenant info loaded from the session.",[1266,1273,1274],{},"Increment a per-user counter for billing.",[768,1276,1278],{"id":1277},"what-happens-when-auth-fails","What happens when auth fails",[588,1280,1281,1282,1285,1286,1039,1288,1291],{},"The middleware catches every error from ",[591,1283,1284],{},"getSession"," and logs nothing, so your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[591,1287,765],{},[591,1289,1290],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1293,1294,1295],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":605,"searchDepth":643,"depth":643,"links":1297},[1298,1299,1300,1301],{"id":770,"depth":643,"text":346},{"id":887,"depth":643,"text":888},{"id":1059,"depth":643,"text":1060},{"id":1277,"depth":643,"text":1278},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1305,1308],{"label":369,"icon":372,"to":370,"color":1306,"variant":1307},"neutral","subtle",{"label":383,"icon":112,"to":384,"color":1306,"variant":1307},{},{"title":374,"icon":377},{"title":583,"description":1302},"W5iPJDKIMXykmBxrqRGnyCbSUGNKZLZjNw0Sw3TEzU0",[1314,1316],{"title":369,"path":370,"stem":371,"description":1315,"icon":372,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":379,"path":380,"stem":381,"description":1317,"icon":330,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1789074372695]