feat: device authorization RFC 8628 (#5646)

* device auth: implement the write events

* add grant type device code

* fix(init): check if default value implements stringer

---------

Co-authored-by: adlerhurst <silvan.reusser@gmail.com>

internal/eventstore/handler/crdb/init_test.go

@@ -0,0 +1,49 @@
+package crdb
+
+import "testing"
+
+func Test_defaultValue(t *testing.T) {
+	type args struct {
+		value interface{}
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "string",
+			args: args{
+				value: "asdf",
+			},
+			want: "'asdf'",
+		},
+		{
+			name: "primitive non string",
+			args: args{
+				value: 1,
+			},
+			want: "1",
+		},
+		{
+			name: "stringer",
+			args: args{
+				value: testStringer(0),
+			},
+			want: "0",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := defaultValue(tt.args.value); got != tt.want {
+				t.Errorf("defaultValue() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+type testStringer int
+
+func (t testStringer) String() string {
+	return "0529958243"
+}