code: public Principal createUser(final SecurityContext securityContext, final PropertyKey credentialKey, final String credentialValue, final String confKey) {
  
  		return createUser(securityContext, credentialKey, credentialValue, Collections.EMPTY_MAP, confKey);
  
  	}
docs: Create a new user.
  
  If a {@link Person} is found, convert that object to a {@link User} object.
  Do not auto-create a new user.
  
  @param securityContext
  @param credentialKey
  @param credentialValue
  @param confKey
  @return user