FAILED: No config file 'alembic.ini' found, or file has no '[alembic]' section

This error typically occurs when the Alembic library is unable to locate the configuration file 'alembic.ini' in the specified directory. To resolve this issue, you can try the following steps:

1. Make sure that the 'alembic.ini' file is located in the root directory of your project or in the directory specified in the Alembic configuration.

2. Check if the 'alembic.ini' file contains a '[alembic]' section at the beginning of the file. If not, you can create a new 'alembic.ini' file with the following content:

[alembic]
script_location = alembic

3. If the 'alembic.ini' file is located in a different directory, you can specify the path to the configuration file using the '--config' option when running Alembic commands. For example:

alembic upgrade head --config /path/to/alembic.ini

By following these steps, you should be able to resolve the 'No config file 'alembic.ini' found, or file has no '[alembic]' section' error and successfully run Alembic commands in your project.