getUserInfo method
Retrieves the user info obtained during the authorization process.
Return:
-String?: an optional encoded string, which can be encoded into OpenIdClaims
using jsonDecode() and OpenIdClaims.fromJson().
Note: Do not call this method before calling authorize().
Implementation
String? getUserInfo() {
final claim = credential?.idToken.claims;
return (claim == null) ? null : _userInfoToEncodedString(claim);
}