The following provides a general list of the steps you must take to create an API in the API Designer:
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Start the API Designer.
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Create API files (in which you can define an API method, for example).
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Create an API project or edit an existing one (for example, supplied by One Identity) to take advantage of the features already available and customize it to your own needs.
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Configure the authentication for the API project (Single Sign-On, for example).
NOTE: If you edit an existing API project supplied by One Identity, you will no longer be able to change the authentication.
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Assign the created API files to the API project.
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Test the API.
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Compile the API.
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Save the changes to the database.