feat: Add role parameter to configure password length

[rblaine95]

• Default length remains 16

Closes #37

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[github-actions]

Please ensure your PR conforms to conventional commits (see https://www.conventionalcommits.org).

Commits MUST be prefixed with a type, which consists of one of the following:

• build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
• ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
• docs: Documentation only changes
• feat: A new feature
• fix: A bug fix
• perf: A code change that improves performance
• refactor: A code change that neither fixes a bug nor adds a feature
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
• test: Adding missing tests or correcting existing tests
• chore: No production code change