Adds create_user option to optionally skip user creation

[jovial]

Can be useful for LDAP users, where you do no wish to create them, but you do want to assign roles.

[gemini-code-assist]

Summary of Changes

Hello @jovial, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances user management within projects by introducing an optional create_user parameter. This new flag provides flexibility to control whether a user should be created by the system or if their creation should be bypassed, which is especially useful for integrating with external identity management systems like LDAP where users are pre-existing and the primary need is to assign roles. The change updates both the documentation and the user creation task to implement this conditional logic.

Highlights

• New create_user option: Introduced an optional create_user boolean parameter for project users, allowing for conditional user creation or skipping.
• Conditional user creation logic: The user creation task in users.yml now includes a when condition. User creation will proceed if create_user is not defined or set to false. If create_user is set to true, the user creation task will be skipped.
• LDAP integration support: This feature is particularly useful for environments where users are managed externally, such as through LDAP, and the system only needs to assign roles without creating the user.

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[gemini-code-assist]

Code Review

This pull request adds a create_user option to allow skipping user creation, which is a useful feature for environments with externally managed users (e.g., LDAP). While the documentation update in the README is clear, the implementation in the Ansible task has a critical logic error. The conditional logic for user creation is inverted, meaning users are created when they should be skipped and vice-versa. I have provided a review comment with a suggested fix to correct this behavior.

[JohnGarbutt]

cool, useful for federated users too.