Example-handle-auth-error.rb

def handleAuthError 
	puts 'Put error handling code here'
end

project_params = {
	slug:					"test-#{SecureRandom.uuid}",
	description:				'wpml_project',
	organization:				user_data[:org_slug],
	:private	=>			true,
	source_language_code:			'en',
	name:					"Test project-#{SecureRandom.uuid}"
}

begin
project = Transifex::Projects.create(project_params)
project.fetch
rescue => e 
	handleAuthError if e.message.include? 'Authorization Required'
end

Yes, I agree the intent is to use a single set of credentials at a time. Using security credentials between multiple systems is very problematic with just username and password and can often result in these values being stored remotely without the users knowledge. A better solution is to us a Auth protocol like OAuth which works off of tokens that a user can revoke.

Although, I'm not sure I understand why you need to authenticate as multiple different users. It's really difficult for me to understand what you are trying to accomplish without seeing the code that you are referencing.