Hello again.
First:
I remove the comments. Thank you.
Second:
The setting of the pin mode in this case depends on the connection of the Database because it loads data from the database and moves them to variables in the Arduino.
If you do not connect to the database, you can not continue the process. (this part I have not programmed)
Third:
"You still need to post a link to the RFID you are using" I do not understand this part.
"Does the device keep making data available while the card is held near the antenna, or not?"
Yes. When finish the process, it continue again.