customization - in woocommerce how to set username as mobile number at registration -

i building website using woocommerce.by default username customer username.i want provide users feature login through phone number also. how can that? please help!

this possible. think not idea.. imagine 2 users shares same number.

but if can manage make phone number unique, can try woocommerce login form.

    add_filter('woocommerce_login_credentials','woocommerce_login_credentials', 10, 1);     function woocommerce_login_credentials($creds){          $username = trim( $_post['username'] );         if (is_numeric($username)){ // assumes numeric allowed. can own logic here.             $user = get_users(array(                 'meta_query' => array(                     array(                         'key'     => 'billing_phone',                         'value'   => $username,                         'compare' => 'like',                     ),                 )             ));             $creds['user_login'] = $user[0]->data->user_login;         }         return $creds;     } 

this code using billing phone number. if phone number belongs lot of users, first user query gets used. code is, gets user_login of user using given phone number. use username logged in. can still use username/email login code.

this answer demonstrate can done. won't advice doing so.