set
Sets a custom attribute to the given number of seconds elapsed since the epoch. The key parameter is limited to 255 characters in length and can only contain alphanumeric characters and underscores. Keys which are too long will be truncated. Keys may not be a reserved key. See CustomAttributeValidationUtils.isValidCustomAttributeKey
Return
whether or not the custom user attribute was set correctly
Parameters
key
The identifier of the custom attribute
seconds
number of seconds elapsed since the epoch