Step1:
Log in to ShipOut.com account> Setting> Selling Channels> Connect a Store or Maketplace> Amazon
Step 2:
Click the blue font “here” in step 1 of the figure below to log in to the Amazon account.
Step 3:
On the Amazon page>App store>Authorize for new developers>Fill in the developer name and ID (see step 2 for the developer information)>Check to agree to authorization and click Next>Fill the obtained information into ShipOut .