{
    "user_name": "string between 4 to 40 characters"
}

{
    "must_login": "user must be login",
    "taken_name": "any string containing 'pantel' or 'pante1' can't use for user name",
    "user_name": [
        {
            "min length is 4": "minimum length of username is 4"
        },
        {
            "max length is 40": "maximum length of username is 40"
        }
    ],
    "user_name_is_duplicate": "username is already taken by other users",
    "wrong_username": "unacceptable characters as username in input"
}

• Url:

• Output:

                                {
    "status": "success",
    "time": 1526726826.6275113
}