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GET: http://localhost:8080/auth/admin/realms/{real-name}/users?username=testUser&exact=true
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curl \
-H "Authorization: bearer eyJhbGciOiJSU...." \
"http://localhost:8080/auth/admin/realms/master/users/349f67de-36e6-4552-ac54-e52085109616"
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GET: http://localhost:8080/auth/admin/realms/{real-name}/users?username=testUser