Get claims method from the token handler of JWT API.

TokenHandler.cs

private IEnumerable<Claim> GetClaims(User user)
{
    var claims = new List<Claim>
    {
        new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
        new Claim(JwtRegisteredClaimNames.Sub, user.Email)
    };

    foreach (var userRole in user.UserRoles)
    {
        claims.Add(new Claim(ClaimTypes.Role, userRole.Role.Name));
    }

    return claims;
}