post
https://api-sandboxdash.norcapsecurities.com/tapiv3/index.php/v3/updateLinkExternalAccount
***** This Method has third party fees associated with it that will be charged for each use. The cost to use this method is $1.80 each time the method is invoked. (Only applies in live API environment. Does not apply in the Sandbox Environment) ***** This method is used to update an external account using Plaid. Only one external account can be created for an account