Extending the /me endpoint

Greetings,

I am still tinkering around to extend the /me endpoint.

I am trying to add avatar support.

However, when I send the code through, it gets jumbled up by the endpoint.

 $usrImg = get_avatar_url($user);
 $usrImg2 = strstr($usrImg, '?s', true);
 $usrImg3 = trim($usrImg2, "//");
 $usrImg_arr = array(
 "user_avatar" => $usrImg3);
 var_dump($usrImg3);
 
 $result3 = $result2 + $usrImg_arr;
 
 $response = new WPOAuth2\Response($result3);  //$me_data //$result //$result4
 $response->send();

expected result: http://www.gravatar.com/avatar/xxxxxxxxxxxxxxxxxx
actual result: http://www.gravatar.com\/avatar\/xxxxxxxxxxxxxxxxxx

I have done everything I could think of to trim, replace, and otherwise pass this through. I keep getting that wonky string in the endpoint. Which makes me believe this is being done with the beautification methods, but I am clueless how to side-step it.