I am having an issue with a simple app script to create a person record in NationBuilder. I've checked my JSON data and verified it with REQBIN and it works in the API explorer. The error is "I can only talk JSON. Please set 'Accept' and 'Content-Type' to 'application/json'" I have both of the attributes in the options model. I've even tried every possible capitalization combination.??? If anyone has some google app script that is known to work, I would really appreciate it. Everything I have found so far isn't working. TIA.