Get rid of hardcoded admin user uuid

The UUID is generated by `ocs init` now and stored in the config file.
To avoid that every ocis install uses the same UUID

Closes: #3524

ocis/pkg/init/init.go

@@ -100,6 +100,7 @@ type OcisConfig struct {
 	MachineAuthApiKey string       `yaml:"machine_auth_api_key"`
 	TransferSecret    string       `yaml:"transfer_secret"`
 	SystemUserID      string       `yaml:"system_user_id"`
+	AdminUserID       string       `yaml:"admin_user_id"`
 	Graph             GraphExtension
 	Idp               LdapBasedExtension
 	Idm               IdmExtension
@@ -162,6 +163,7 @@ func CreateConfig(insecure, forceOverwrite bool, configPath, adminPassword strin
 	}
 
 	systemUserID := uuid.Must(uuid.NewV4()).String()
+	adminUserID := uuid.Must(uuid.NewV4()).String()
 
 	idmServicePassword, err := generators.GenerateRandomPassword(passwordLength)
 	if err != nil {
@@ -203,6 +205,7 @@ func CreateConfig(insecure, forceOverwrite bool, configPath, adminPassword strin
 		MachineAuthApiKey: machineAuthApiKey,
 		TransferSecret:    revaTransferSecret,
 		SystemUserID:      systemUserID,
+		AdminUserID:       adminUserID,
 		Idm: IdmExtension{
 			ServiceUserPasswords: ServiceUserPasswordsSettings{
 				AdminPassword: ocisAdminServicePassword,