Implementing password-based authentication
The OAuth 2.0 specification, or OAuth2, is the most preferred solution for authenticating API endpoint access. The OAuth2 authorization framework defines the four authorization flows, which are implicit, client credentials, authorization code, and resource password flows. The first three of these can be used with third-party authentication providers, which will authorize the access of the API endpoints. In the FastAPI platform, the resource password flow can be customized and implemented within the application to carry out the authentication procedure. Let us now explore how FastAPI supports the OAuth2 specification.
Installing the python-multipart module
Since OAuth2 authentication will not be possible without a form handling procedure, we need to install the python-multipart module before pursuing the implementation part. We can run the following command to install the extension:
pip install python-multipart