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Go to Setup > OAuth and OpenID Connect Settings > enable Allow OAuth Username-Password Flows
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After creating the Edval app, start the connection between your Org and the Edval file.
Open this link in a New tab
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Go to Setup > OAuth and OpenID Connect Settings > enable Allow OAuth Username-Password Flows
...
After creating the Edval app, start the connection between your Org and the Edval file.
Open this link in a New tab
...