feat(member): add flags (#1499)

---------

Co-authored-by: Fedor Lapshin <[email protected]>

structs.go

@@ -1476,6 +1476,22 @@ type Assets struct {
 	SmallText    string `json:"small_text,omitempty"`
 }
 
+// MemberFlags represent flags of a guild member.
+// https://discord.com/developers/docs/resources/guild#guild-member-object-guild-member-flags
+type MemberFlags int
+
+// Block containing known MemberFlags values.
+const (
+	// MemberFlagDidRejoin indicates whether the Member has left and rejoined the guild.
+	MemberFlagDidRejoin MemberFlags = 1 << 0
+	// MemberFlagCompletedOnboarding indicates whether the Member has completed onboarding.
+	MemberFlagCompletedOnboarding MemberFlags = 1 << 1
+	// MemberFlagBypassesVerification indicates whether the Member is exempt from guild verification requirements.
+	MemberFlagBypassesVerification MemberFlags = 1 << 2
+	// MemberFlagStartedOnboarding indicates whether the Member has started onboarding.
+	MemberFlagStartedOnboarding MemberFlags = 1 << 3
+)
+
 // A Member stores user information for Guild members. A guild
 // member represents a certain user's presence in a guild.
 type Member struct {
@@ -1506,6 +1522,10 @@ type Member struct {
 	// When the user used their Nitro boost on the server
 	PremiumSince *time.Time `json:"premium_since"`
 
+	// The flags of this member. This is a combination of bit masks; the presence of a certain
+	// flag can be checked by performing a bitwise AND between this int and the flag.
+	Flags MemberFlags `json:"flags"`
+
 	// Is true while the member hasn't accepted the membership screen.
 	Pending bool `json:"pending"`