Search Message extension oAuth card styling - microsoft-teams

Question

I have requirement to style (change the color of link instead blue) and change the text in auth card in Search message extension. I tried to pass all parameters. But nothing appear to impact. I also tried to generate an Adpative card with text having link. But link doesnt have styling option.
This is code , I am using right now :
return new MessagingExtensionResponse
{
ComposeExtension = new MessagingExtensionResult
{
Type = "auth",
SuggestedActions = new MessagingExtensionSuggestedAction
{
Actions = new List<CardAction>
{
new CardAction
{
Type = ActionTypes.OpenUrl,
Value = signInLink,
Title = "Sign in"
},
},
},
},
};
Adaptive Card Json Tried:
{
"type": "TextBlock",
"text": "Please [Sign in](https://adaptivecards.io)"
}
I tried o replace crad action as suggested below, but it didnt work.
`
private async Task GetAuthCard(ITurnContext turnContext, CancellationToken cancellationToken)
{
// Retrieve OAuth Sign in Link
string signInLink = await GetSignInLinkAsync(turnContext, cancellationToken).ConfigureAwait(false);
AuthCardModel auth = new();
auth.AdaptiveCardPath = Path.Combine(".", "Resources", "AuthCardTemplate.json");
auth.signinLink = signInLink;
Attachment adaptiveCard = CreateAdaptiveCardActivity(auth.AdaptiveCardPath, auth);
_logger.LogWarning($"[TeamsBot LogIn adaptive card] -> {JsonConvert.SerializeObject(adaptiveCard)}");
MessagingExtensionAttachment attachment = new MessagingExtensionAttachment
{
ContentType = ThumbnailCard.ContentType,
Content = adaptiveCard.Content,
};
return new MessagingExtensionResponse
{
ComposeExtension = new MessagingExtensionResult
{
Type = "auth",
AttachmentLayout = "list",
Attachments = new List<MessagingExtensionAttachment> { attachment },
},
};
}
`
AuthCardTemplate.json :
`
{
"type": "AdaptiveCard",
"body": [
{
"type": "TextBlock",
"text": "__ * * Sign in * * __"
}
],
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"version": "1.3"
}
`

Answer 1

Teams Does not support Card action button styling in cards. This is by design. Markdown is a simple way to format text that looks great on any device. It doesn’t do anything fancy like change the font size, color, or type — just the essentials.
Document-https://learn.microsoft.com/en-us/adaptive-cards/authoring-cards/text-features#markdown-commonmark-subset