wp_insert_user always tries the same user name

Before doing anything, make sure that the user account doesn’t already exist. This is really easy to do with the username_exists function.

 if( null == username_exists( $username ) ) {

     echo "user not exist";

 }

use the above code and see what happen

then do as below

$user_id = wp_create_user ( $email_address, $password, $email_address );

all code like

if( null == username_exists( $username) ) {

  // Generate the password and create the user
  $password = wp_generate_password( 12, false );
  $user_id = wp_create_user( $username, $password, $email_address );

  // Set the nickname
  wp_update_user(
    array(
      'ID'          =>    $user_id,
      'nickname'    =>    $email_address
    )
  );

  // Set the role
  $user = new WP_User( $user_id );
  $user->set_role( 'contributor' );

  // Email the user
  wp_mail( $email_address, 'Welcome!', 'Your Password: ' . $password );

} // end if

if even not work than do like below

codes func :-

//function wp_create_user($username, $password, $email="") {
    //$user_login = esc_sql( $username );
    //$user_email = esc_sql( $email    );
    //$user_pass = $password;

    //$userdata = compact('user_login', 'user_email', 'user_pass');
    //return wp_insert_user($userdata);
   //}

user it will too. use like this codex func.

$user_id = username_exists( $user_name );
if ( !$user_id and email_exists($user_email) == false ) {
    $random_password = wp_generate_password( $length=12, $include_standard_special_chars=false );
    $user_id = wp_create_user( $user_name, $random_password, $user_email );
} else {
    $random_password = __('User already exists.  Password inherited.');
}

i hope its work well

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