Fill in remaining missing pieces

- Database schema changes, removing obsolete custom domain-related code
- Missing user structs
- Setup verbiage changes
- Missing routes
- Missing error messages

users.go

@@ -9,6 +9,35 @@ import (
 )
 
 type (
+	userCredentials struct {
+		Alias string `json:"alias" schema:"alias"`
+		Pass  string `json:"pass" schema:"pass"`
+		Email string `json:"email" schema:"email"`
+		Web   bool   `json:"web" schema:"-"`
+		To    string `json:"-" schema:"to"`
+
+		EmailLogin bool `json:"via_email" schema:"via_email"`
+	}
+
+	userRegistration struct {
+		userCredentials
+		Honeypot  string `json:"fullname" schema:"fullname"`
+		Normalize bool   `json:"normalize" schema:"normalize"`
+		Signup    bool   `json:"signup" schema:"signup"`
+	}
+
+	// AuthUser contains information for a newly authenticated user (either
+	// from signing up or logging in).
+	AuthUser struct {
+		AccessToken string `json:"access_token,omitempty"`
+		Password    string `json:"password,omitempty"`
+		User        *User  `json:"user"`
+
+		// Verbose user data
+		Posts       *[]PublicPost `json:"posts,omitempty"`
+		Collections *[]Collection `json:"collections,omitempty"`
+	}
+
 	// User is a consistent user object in the database and all contexts (auth
 	// and non-auth) in the API.
 	User struct {
@@ -21,6 +50,20 @@ type (
 
 		clearEmail string `json:"email"`
 	}
+
+	userMeStats struct {
+		TotalCollections, TotalArticles, CollectionPosts uint64
+	}
+
+	ExportUser struct {
+		*User
+		Collections    *[]CollectionObj `json:"collections"`
+		AnonymousPosts []PublicPost     `json:"posts"`
+	}
+
+	PublicUser struct {
+		Username string `json:"username"`
+	}
 )
 
 // EmailClear decrypts and returns the user's email, caching it in the user