Update security lab with OAuth 2.0 workflow

[chrishoina]

Update with code snippet for adding Authentication in Flask application.

[chrishoina]

Need to use the "Implicit Flow" workflow for Authentication.

[chrishoina]

• https://docs.authlib.org/en/v0.15.4/flask/2/grants.html#implicit-grant
• https://docs.oracle.com/en/database/oracle/oracle-rest-data-services/18.4/aelig/developing-REST-applications.html