If you edit the token field in the CesiumSettings/Resources/CesiumIonServers/ion.cesium.com asset directly using the project tab, Unity silently saves it when you either exit the editor or save the project.
However, if you edit the token using Cesium's "Token" panel, then the token is never saved.
This is major problem that needs to be fixed urgently, but as a workaround you can get the token to save by clicking the folder icon next to the ion server selector to navigate to the asset in the Project tab:
Then, with the server asset selected, in the Inspector tab, change any field and then change it back. Now when you exit the Unity Editor or save the project, the new token should be saved.
This has been reported several times on the community forum recently:
And I just confirmed it myself.
If you edit the token field in the
CesiumSettings/Resources/CesiumIonServers/ion.cesium.comasset directly using the project tab, Unity silently saves it when you either exit the editor or save the project.However, if you edit the token using Cesium's "Token" panel, then the token is never saved.
This is major problem that needs to be fixed urgently, but as a workaround you can get the token to save by clicking the folder icon next to the ion server selector to navigate to the asset in the Project tab:
Then, with the server asset selected, in the Inspector tab, change any field and then change it back. Now when you exit the Unity Editor or save the project, the new token should be saved.