- Fix User Signup (#16667)

(cherry picked from commit b4cba8a)

openmetadata-service/src/main/java/org/openmetadata/service/resources/teams/UserResource.java

@@ -567,15 +567,23 @@ public Response createUser(
     // Add the roles on user creation
     updateUserRolesIfRequired(user, containerRequestContext);
 
-    // TODO do we need to authenticate user is creating himself?
-    Response createdUser = create(uriInfo, securityContext, user);
+    Response createdUserRes = null;
+    try {
+      createdUserRes = create(uriInfo, securityContext, user);
+    } catch (EntityNotFoundException ex) {
+      if (securityContext.getUserPrincipal().getName().equals(create.getName())) {
+        // User is creating himself on signup ?! :(
+        User created = addHref(uriInfo, repository.create(uriInfo, user));
+        createdUserRes = Response.created(created.getHref()).entity(created).build();
+      }
+    }
 
     // Send Invite mail to user
     sendInviteMailToUserForBasicAuth(uriInfo, user, create);
 
     // Update response to remove auth fields
-    decryptOrNullify(securityContext, (User) createdUser.getEntity());
-    return createdUser;
+    decryptOrNullify(securityContext, (User) createdUserRes.getEntity());
+    return createdUserRes;
   }
 
   private void validateAndAddUserAuthForBasic(User user, CreateUser create) {