Problem

When users encounter validation errors with molecule login, the error messages provide specific information about what went wrong but don't direct users to documentation that explains proper usage patterns and available options.

Solution

Add references to the official documentation in error messages to improve discoverability of usage information and help users understand how to properly use the login command.

Changes

Updated three common error scenarios in molecule login to include documentation links:

• Multiple hosts without --host flag: When multiple instances are running and user doesn't specify which host to login to
• Host not found: When the specified hostname doesn't match any available hosts
• Ambiguous host pattern: When the hostname pattern matches multiple hosts and requires disambiguation

Each error message now includes:

For more information: https://ansible.readthedocs.io/projects/molecule/usage/#molecule-login

Behavior

Before:

$ molecule login --host invalid
CRITICAL There are no hosts that match 'invalid'. You can only login to valid hosts.

After:

$ molecule login --host invalid  
CRITICAL There are no hosts that match 'invalid'. You can only login to valid hosts.

For more information: https://ansible.readthedocs.io/projects/molecule/usage/#molecule-login

This provides users with a direct path to comprehensive documentation explaining login usage, available options, and examples.