use first letter of display name / name / id as default avatar

src/synapse/authProvider.ts

@@ -172,7 +172,6 @@ const authProvider: AuthProvider = {
   // called when the user navigates to a new location, to check for authentication
   checkAuth: () => {
     const access_token = storage.getItem("access_token");
-    console.log("checkAuth " + access_token);
     return typeof access_token === "string" ? Promise.resolve() : Promise.reject();
   },
   // called when the user navigates to a new location, to check for permissions / roles