[keycloak-user] Managing user from my java backend

Hi I want to manage my users from my app but I dont understand some things. My backend is on java, front is on angular. So for my backend I used client of Type Bearer Only. I was looking at this example https://github.com/keycloak/keycloak/blob/master/examples/demo-template/a... And this one https://gist.github.com/thomasdarimont/43689aefb37540624e35 So my question is Should I create a User in my keycloak server for my app to use? Or should I use another type of client? Can i connect using just the client credentials? I thought I will have use the secret in credentials and the token there to connect? Thanks