I have multiple variable ports which gave some fixed values assigned. I need to pass this variable ports into single output port as string and capture in flatfile.

Expression:

Id_v:'xxxx'
Password_v:'vbbccvn'
Key_v:'ryccdfj'
Outputport:

Required output in flat file:

Id:xxxxx
Password:vbbccvn
Key:ryccdfj

I have written the expression editor as follows

The mapping is as follows:

the http is configured as follows, I need to get access token by sending the first http request. Is the simple post right method as I'm sending as single body?

I'm getting error as repository error_12400[attributes, base url not found] EP_12400 Repository error(Attribute name, base URL , cannot be found) PCHTTP_33022:Cannot send transport parameter to Java PCHTTP_33006:Error in getting URL for the connection(http_transformation)