feat: existing user can sign in with sso

apps/OpenSignServer/auth/authadapter.js

@@ -0,0 +1,27 @@
+import axios from 'axios';
+
+export const SSOAuth = {
+  // Returns a promise that fulfills if this user mail is valid.
+  validateAuthData: async authData => {
+    try {
+      const response = await axios.get('https://osl-jacksonv2.vercel.app/api/oauth/userinfo', {
+        headers: {
+          Authorization: `Bearer ${authData.access_token}`,
+        },
+      });
+      //   console.log('response.data.id ', response.data.email);
+      //   console.log('authData.id', authData.id);
+      if (response.data && response.data.id && response.data.email === authData.id) {
+        return;
+      }
+      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'SSO auth is invalid for this user.');
+    } catch (error) {
+      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'SSO auth is invalid for this user.');
+    }
+  },
+
+  // Returns a promise that fulfills if this app id is valid.
+  validateAppId: () => {
+    return Promise.resolve();
+  },
+};