#MM-12130 changes for custom service terms (#9450)

* #MM-12130 changes for custom service terms

* Fixed styling

* Added getServiceTerms API

* removed unnecessary panic

* removed custom service terms text from flat config

* reverted user sql store as those changes are no longer needed

* added tests

* Updated a config key to be more standard

* Added copyright info

* Loading service terms only if the feature is enabled

* Loading service terms only if the feature is enabled

* removed unused index

* added createservice termns API

* made a param to bool instead of string

* added createservice termns API

* review fixes

* fixed styling

* Minor refactoring

* removed saveConfig and loadConfig magic

* added empty service terms text check to createServiceTerms API

* refactoed some urls to be terms_of_service instead of service_terms

* removed check for support settings

* changed URLs in tests

* removed unused code

* fixed a bug

* added service termd id in conif

* fixed a test

* review fixes

* minor fixes

* Fixed TestCreateServiceTerms

api4/user_test.go

@@ -3019,3 +3019,28 @@ func TestGetUsersByStatus(t *testing.T) {
 		}
 	})
 }
+
+func TestRegisterServiceTermsAction(t *testing.T) {
+	th := Setup().InitBasic()
+	defer th.TearDown()
+	Client := th.Client
+
+	success, resp := Client.RegisterServiceTermsAction(th.BasicUser.Id, "st_1", true)
+	CheckErrorMessage(t, resp, "store.sql_service_terms_store.get.no_rows.app_error")
+
+	serviceTerms, err := th.App.CreateServiceTerms("service terms", th.BasicUser.Id)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	success, resp = Client.RegisterServiceTermsAction(th.BasicUser.Id, serviceTerms.Id, true)
+	CheckNoError(t, resp)
+
+	assert.True(t, *success)
+	user, err := th.App.GetUser(th.BasicUser.Id)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	assert.Equal(t, user.AcceptedServiceTermsId, serviceTerms.Id)
+}