code: public OvhTask serviceName_user_userName_grant_databaseName_update_POST(String serviceName, String userName, String databaseName, OvhGrantEnum grant) throws IOException {
  		String qPath = "/hosting/privateDatabase/{serviceName}/user/{userName}/grant/{databaseName}/update";
  		StringBuilder sb = path(qPath, serviceName, userName, databaseName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "grant", grant);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhTask.class);
  	}
docs: Update user grant
  
  REST: POST /hosting/privateDatabase/{serviceName}/user/{userName}/grant/{databaseName}/update
  @param grant [required] Grant you want set on the database for this user
  @param serviceName [required] The internal name of your private database
  @param userName [required] User name used to connect to your databases
  @param databaseName [required] Database name where grant is set