Provide possibility to enter Access Token on demand

seqs/matrix.sh

@@ -540,8 +540,10 @@ toolScript() {
 
 # End step if no admin access token is configured
 adminTokenCheck() {
-  if [ -z $MATRIX_ACCESS ] ; then
-    return 1
+  if [ -z "$MATRIX_ACCESS" ] ; then
+    [ $QUIET -eq 0 ] && read -s -p "Please enter admin access tocken: " MATRIX_ACCESS
+    # return -1 if it is still empty
+    [ -z "$MATRIX_ACCESS" ] && return -1
   fi
   return 0
 }