### Description

The current length limit for the `login` parameter in an HTTP connection is 500 characters. It'd be nice if this was 5000 characters like the `password` parameter.

### Use case/motivation

We've run into an issue with an API we need to integrate with. It uses basic HTTP authentication, and both username and password are about 900 characters long each. We don't have any control over this API, so we cannot change the authentication method, nor the length of these usernames and passwords.

### Related issues

_No response_

### Are you willing to submit a PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""
    Compare types between ORM and DB .
    return False if the metadata_type is the same as the inspected_type
    or None to allow the default implementation to compare these
    types. a return value of True means the two types do not
    match and should result in a type change operation.
    """
    if context.dialect.name == "mysql":
        from sqlalchemy import String
        from sqlalchemy.dialects import mysql
        if isinstance(inspected_type, mysql.VARCHAR) and isinstance(metadata_type, String):
            
            
            
            if inspected_type.length != metadata_type.length:
                return True
            return False
    return None
def compare_server_default(