Add email field & Gravatar url

[marcduiker]

In order for Gravatar to work an email address is required.

In case the user registers a new account, Gravatar is used (incl a fallback to a random image from blob storage). In case the user registers via Auth0 and Google is used, the Google profile image is used.

The default image size from Gravatar/Google is rather small (80-90 pixels) therefore two new image properties are introduced. One with a small profile image, to be used in the chat, and one with a large profile image, to be used in the profile details.

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Azure Static Web Apps: Your stage site is ready! Visit it here: https://gentle-dune-0fec87f03-58.westeurope.azurestaticapps.net

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Azure Static Web Apps: Your stage site is ready! Visit it here: https://gentle-dune-0fec87f03-58.westeurope.azurestaticapps.net

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Azure Static Web Apps: Your stage site is ready! Visit it here: https://gentle-dune-0fec87f03-58.westeurope.azurestaticapps.net

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[fliptopbox]

Do we have a primary key constraint for our data? i ask coz currently it looks like a user can use the same email address for multiple user accounts.

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