### 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)

from flask import Flask
    from flask_sqlalchemy import SQLAlchemy
    from airflow.www.session import AirflowDatabaseSessionInterface
    flask_app = Flask(__name__)
    flask_app.config["SQLALCHEMY_DATABASE_URI"] = sql_database_uri
    flask_app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
    db = SQLAlchemy(flask_app)
    AirflowDatabaseSessionInterface(app=flask_app, db=db, table="session", key_prefix="")
    return db
def _create_db_from_orm(session):
    from alembic import command
    from airflow.auth.managers.fab.models import Model
    from airflow.models.base import Base
    def _create_flask_session_tbl(sql_database_uri):
        db = _get_flask_db(sql_database_uri)
        db.create_all()
    with create_global_lock(session=session, lock=DBLocks.MIGRATIONS):
        engine = session.get_bind().engine
        Base.metadata.create_all(engine)
        Model.metadata.create_all(engine)
        _create_flask_session_tbl(engine.url)
        
        config = _get_alembic_config()
        command.stamp(config, "head")
@provide_session
def initdb(session: Session = NEW_SESSION, load_connections: bool = True):