How to simulate user flows in the Sandbox

This article outlines how to simulate MFA and error flows within Plaid Link. This must be done within the Sandbox environment. 

Simulating MFA

You can simulate the various MFA flows within Plaid Link by using the following passwords in conjunction with the Sandbox username, user_good:

• mfa_device: simulate a device MFA flow, such as a code that is sent to your user's phone via SMS
• mfa_questions_<n>_<m>: simulate a questions-based MFA flow – you can control the number of rounds and questions your user must answer by adjusting the n and m values, respectively 
• mfa_selections: simulate a selections-based MFA flow where your user is asked a single security question and given several answer options to select from
• mfa_selections_<n>_<m>_<o>: simulate a multiple-selections MFA flow where your user is asked multiple security questions and given several answer options to select from for each question. The number of rounds, questions, and answer options can be controlled by adjusting the n, m, and o values, respectively. 

Simulating errors

You can simulate an ITEM_ERROR or INSTITUTION_ERROR that your user could encounter during the Plaid Link flow. To do so, modify the password accordingly:

error_[ERROR_CODE]

For example, if you want to simulate an INVALID_CREDENTIALS error, you must use the following password: error_INVALID_CREDENTIALS