Message in Spanish (Español)
ID2079: SecurityTokenService.SecurityTokenDescriptor.SigningCredentials es null. Especifique una credencial válida con la que firmar el token emitido en el ámbito devuelto por SecurityTokenService.GetScope. Si tiene que emitir tokens sin firmar, tendrá que invalidar SecurityTokenService.Issue.
Unlocalized message
ID2079: SecurityTokenService.SecurityTokenDescriptor.SigningCredentials is null. Specify a valid credential to sign the issued token with, in the Scope that is returned by SecurityTokenService.GetScope. If you need to issue unsigned tokens, you will need to override SecurityTokenService.Issue.
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