This function is part of the Connect Interface.
Fetch an external account ID, in string form, that maps to a given Product User ID.
An EOS_EResult that indicates the external account ID was copied into the OutBuffer.
EOS_Success if the information is available and passed out in OutUserInfo.
EOS_InvalidParameters if you pass a null pointer for the out parameter.
EOS_NotFound if the mapping doesn't exist or hasn't been queried yet.
EOS_LimitExceeded if the OutBuffer is not large enough to receive the external account ID. InOutBufferLength contains the required minimum length to perform the operation successfully.
|Parameter Type And Name||Usage Information|
|const EOS_Connect_GetProductUserIdMappingOptions* Options||structure containing the local user and target Product User ID.|
|char* OutBuffer||The buffer into which the external account ID data should be written. The buffer must be long enough to hold a string of EOS_CONNECT_EXTERNAL_ACCOUNT_ID_MAX_LENGTH.|
|int32_t* InOutBufferLength||The size of the OutBuffer in characters. The input buffer should include enough space to be null-terminated. When the function returns, this parameter will be filled with the length of the string copied into OutBuffer.|