feat: better user switching code

wp-content/themes/ccat/server/graphql/login.gql

@@ -0,0 +1,10 @@
+mutation login($email: String!, $password: String!) {
+  login(input: { username: $email, password: $password }) {
+    authToken
+    refreshToken
+    user {
+      id
+      email
+    }
+  }
+}

wp-content/themes/ccat/server/graphql/userSwitchTo.gql

@@ -4,14 +4,7 @@ mutation userSwitchTo($userId: ID!) {
     refreshToken
     user {
       id
-      databaseId
-      username
       email
-      firstName
-      lastName
-      avatar {
-        url
-      }
     }
   }
 }