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Why are the ruparams that I use in the following eBay SignIn url being ignored?
https://signin.ebay.com/ws/eBayISAPI.dll?SignIn&runame=myruname&ruparams=VarA%3DB12309%2VarB%3DABC123
Summary
If you need to send parameters in the Auth & Auth SignIn url to get a User's
token, you need to ensure that you use the correct encoding. For example,
URL encoding for & is %26, however in the above URL, it is specified as %2.
If the encoding is incorrect, the parameters will be ignored. To return
the parameters correctly in the AcceptURL, along with the token, the above
example needs to be modified as below:
https://signin.ebay.com/ws/eBayISAPI.dll?SignIn&runame=myruname&ruparams=VarA%3DB12309%26VarB%3DABC123
When the user signs in successfully, the accept URL will return the
paramaters similar to the following: