To protect the confidentiality of auth and other parameters such as back-end servers, i.e. instead of passing all parameters individually (Editor URL parameters ), partners can generate a session token for their selected parameters and call the editor with the session token. Usage of the token service will become mandatory eventually and is recommended for all partners.
To generate a session token, please follow the link
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Once you have a token, you need to pass the token as a parameter to /editor
the editor will validate the token internally and On successful, it will fetch all parameters from it and will open the drawing file.