Transfer credits from one account to another account, using the username to specify the target account.
The number of credits to transfer from the source account to the target account.
The username of the account to transfer the credits to.
The password of the account to transfer the credits to.
an Hashtable with four keys: 'source_credits_before', 'source_credits_after', 'target_credits_before' and 'target_credits_after' e.g. result.get("target_credits_after")
The number of credits on the source account before the transfer.
The number of credits on the target account before the transfer.
The number of credits on the target account after the transfer.
Specific error codes:
There are insufficient credits available to transfer the specified quantity, or the specified quantity is not a positive number
The target account number specified is not a valid number or username/password combination does not refer to any known account