string serverKey = "AAAAYMU8LNo:APA91bHkuINssRFTKcW8Cc1r9i3ZsERgLtS8DQqnnZzXkLZ3Xwj2nL9LujhlecCyzl5a4vc_K7859DqLTv8Q0bUqfCYi4M7yifZPUgaE9ck4cLt2N73oWbfNr4G1psffc828rIYzVa4U";
...
var regID = "dOw3Z_v6Gsg:APA91bGdmf_mkCmQsKWQH0vNCpfifawOeXOzKBqMxcFxhy4A88bo56qKE_-vGbTE_lAkcrWU1_5svhR3l6q6PqU0Sr6agJq0SVhmMxHe9MPPEpahGxHVeNdjX_xhma3VqQVZ6o2HqEAN";
Publishing this in a public forum is a major security problem because anyone can use and abuse that account.
I recommend to revoke those keys and generate new ones as soon as possible.