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Mock JWT token

    public static class MockJwtTokens
    {
        public static string Issuer { get; } = Guid.NewGuid().ToString();
        public static SecurityKey SecurityKey { get; }
        public static SigningCredentials SigningCredentials { get; }

        private static readonly JwtSecurityTokenHandler s_tokenHandler = new JwtSecurityTokenHandler();
        private static readonly RandomNumberGenerator s_rng = RandomNumberGenerator.Create();
        private static readonly byte[] s_key = new byte[32];

        static MockJwtTokens()
        {
            s_rng.GetBytes(s_key);
            SecurityKey = new SymmetricSecurityKey(s_key) { KeyId = Guid.NewGuid().ToString() };
            SigningCredentials = new SigningCredentials(SecurityKey, SecurityAlgorithms.HmacSha256);
        }

        public static string GenerateJwtToken(IEnumerable<Claim> claims)
        {
            return s_tokenHandler.WriteToken(new JwtSecurityToken(Issuer, null, claims, null, DateTime.UtcNow.AddMinutes(20), SigningCredentials));
        }
    }