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Description of problem:

I want to use an activation key to subscribe system.

I will fill a field 'Organization'
I will forget to till a field 'Activation Key'
I will click 'Register'

and I see a message 

"Error: Missing username or password."

This message is not clear since I have forgetten to fill the field 'Activation Key'.

The exact message should look like:

Error: Missing username or password or activation key'.

I understand that the application cannot decide whether user wanted to use activation key or username/password.

Just for clarity.

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.