How to use import mapping value in dropdown

Hello Everyone, This is my JSON . I want the roles in dropdown . How can i achieve that?  Even if I use importing mapping how can I create list of wrapper value which is non-persistent. Any Idea?  
1 answers

From this import you should create two type of entities which are related:

 - User (with user_id and username)

 - UserRole (with 'name')


The given json should create 2 roles and 1 user object, and relate those 2 roles to the user.


In the microflow that handles this import, check if a given role is already known in your application (through database retrieve) and otherwise, create the role. If the role is already known, only add the assocation to the new user.