Added Null Checking for SubmissionID

To prevent a Null Exception from empty submissions from the database,
this check for null result from database.
Fixed RecaptchaNet.ReadMe
Revert "Added Null Checking for SubmissionID"

This reverts commit 84e621f4f618ca58b81741ed809c7842748fbf5f.
Revert "Added Null Checking for SubmissionID"

This reverts commit 84e621f4f618ca58b81741ed809c7842748fbf5f.
Fixed SubmissionID check for Null and RecaptchaNet.ReadMe for proper WebConfig instruction.