Use the proper Author key, not Authors

modules/auxiliary/admin/netbios/netbios_spoof.rb

@@ -20,7 +20,7 @@ class MetasploitModule < Msf::Auxiliary
         response for a 'WPAD' lookup. Distant targets may require more time and lower
         rates for a successful attack.
       },
-      'Authors'     => [
+      'Author'     => [
         'vvalien',   # Metasploit Module (post)
         'hdm',       # Metasploit Module
         'tombkeeper' # Related Work

modules/auxiliary/server/netbios_spoof_nat.rb

@@ -30,7 +30,7 @@ class MetasploitModule < Msf::Auxiliary
         of NetBIOS requests.
 
       },
-      'Authors'     => [
+      'Author'     => [
         'vvalien',   # Metasploit Module (post)
         'hdm',       # Metasploit Module
         'tombkeeper' # Vulnerability Discovery