Avoid circular dependencies in UserCreation <-> UserCreatedEvent

gears/carto_gears_api/lib/carto_gears_api/events/user_events.rb

@@ -1,6 +1,5 @@
 require_dependency 'carto_gears_api/events/base_event'
 require_dependency 'carto_gears_api/users/user'
-require_dependency 'carto/user_creation'
 
 module CartoGearsApi
   module Events
@@ -9,15 +8,15 @@ module CartoGearsApi
     # @attr_reader [Users::User] user user which was created
     class UserCreationEvent < BaseEvent
       # User created via login in with SAML SSO
-      CREATED_VIA_SAML = Carto::UserCreation::CREATED_VIA_SAML
+      CREATED_VIA_SAML = 'saml'.freeze
       # User created via login with LDAP credentials
-      CREATED_VIA_LDAP = Carto::UserCreation::CREATED_VIA_LDAP
+      CREATED_VIA_LDAP = 'ldap'.freeze
       # User created via signup up to the org
-      CREATED_VIA_ORG_SIGNUP = Carto::UserCreation::CREATED_VIA_ORG_SIGNUP
+      CREATED_VIA_ORG_SIGNUP = 'org_signup'.freeze
       # User created via enterprise user management API (EUMAPI)
-      CREATED_VIA_API = Carto::UserCreation::CREATED_VIA_API
+      CREATED_VIA_API = 'api'.freeze
       # User created via HTTP header authentication
-      CREATED_VIA_HTTP_AUTENTICATION = Carto::UserCreation::CREATED_VIA_HTTP_AUTENTICATION
+      CREATED_VIA_HTTP_AUTENTICATION = 'http_authentication'.freeze
       # User created by organization administrator
       CREATED_VIA_ORG_ADMIN = 'org_admin'.freeze
       # User created by superadmin