Writing a REST Service with Cloud Pages - GET Method Secured

Writing a REST Service with Cloud Pages - GET Method Secured

 if not empty (@token) then	
        set @rows = LookupRows("Rest api authorization","AccessToken",@token)
        set @rowCount = rowcount(@rows)

        if @rowCount > 0 then
If @action=="get" and not empty (@entrycode) then
    	       set @rows = LookupRows("Register","EntryCode",@entrycode)
       set @rowCount = rowcount(@rows)
If @rowCount==0 then
                      output(v(@JsonNotFound))
	endif
	
  	       If @rowCount > 0 then		
set @row = row(@rows,1) 
		set @EmailAddress = field(@row,"EmailAddress")
		set @FristName = field(@row,"FirstName")
		set @LastName = field(@row,"LastName")
		set @phone = field(@row,"PhoneNumber")
		set @Json= '{"status": "ok","data": {"EntryCode":"'
		set @Json= concat(@Json,@entrycode,'","email": "',@EmailAddress)
		set @Json= concat(@Json,'","firstName":"',@FristName)
		set @Json= concat(@Json,'","lastName":"',@LastName)
		set @Json= concat(@Json,'","phoneNumber":"',@phone,'"}')
		set @Json= concat(@Json,'}')
		output(v(@Json))
	     endif	
endif		
    endif	
	If @rowCount == 0 then
                       set @Json= '{"Status":"error", "message":" invalid access Token"}'
	     output(v(@Json))
	  endif
endif