Looks like Photon Changed there authentication APIs

[rgbohner]

The new APIs differentiate between realtime and chat Authentication values and ids

• PhotonNetwork.PhotonServerSettings.AppId now is PhotonNetwork.PhotonServerSettings.AppSettings.AppIdRealtime
• AuthenticationValues in the Playfab authentication code now requires "using Photon.Realtime"

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Document Details

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• ID: 05d74156-e7ed-2c20-165f-d8a1891e518e
• Version Independent ID: 74d959ee-c789-9b1f-1f28-8a27276f769b
• Content: Photon quickstart - PlayFab
• Content Source: playfab-docs/sdks/photon/quickstart.md
• Product: playfab
• GitHub Login: @joannaleecy
• Microsoft Alias: joanlee

[SahilAshar]

@rgbohner - thanks for letting us know about this, and apologies for the late fix. I've just pushed an update to the docs which should hopefully propagate to live soon. Please feel free to open an issue anytime if you have any further feedback 😄