FS‑ACCT — Account Management Functional Specification

1. Purpose

The Account module defines all functionality required for users to create, manage, and maintain their NeuByte account. This includes account creation, authentication prerequisites, profile initialization, validation rules, and system behaviors related to onboarding. This module is foundational and interacts with Authentication, User Profile, Notifications, and Analytics.

2. Scope

This FS covers:

Account creation
Required fields and validation
Email verification trigger
Initial profile setup
Error handling
Accessibility requirements
Security and data integrity rules

This module does not include login, logout, or session management — those are defined in the Authentication FS.

3. References

Business Requirements: BR‑ACCT‑01 → BR‑ACCT‑12
Use Cases: UC‑ACCT‑01 (Create Account), UC‑ACCT‑02 (Resend Verification), UC‑ACCT‑03 (Account Validation Errors)
RTM: Account Module Rows
FS‑AUTH (Authentication)
FS‑PROFILE (User Profile)

4. Functional Requirements

FR‑ACCT‑01 — Display Create Account Form
Description:
The system shall display the Create Account form with all required fields.
Fields:

First Name
Last Name
Email
Password
Confirm Password
Optional: Referral Code

Maps to: BR‑ACCT‑01, UC‑ACCT‑01
FR‑ACCT‑02 — Validate Required Fields
Description:
All required fields must be validated before submission.
Rules:

First/Last Name: alphabetic, 2–50 chars
Email: valid email format
Password: must meet password policy (see FR‑ACCT‑03)
Confirm Password: must match Password Maps to: BR‑ACCT‑02, UC‑ACCT‑01

FR‑ACCT‑03 — Enforce Password Policy
Description:
The system shall enforce the NeuByte password policy.
Rules:

Minimum 8 characters
At least one uppercase letter
At least one number
At least one special character
No spaces Maps to: BR‑ACCT‑03, UC‑ACCT‑01

FR‑ACCT‑04 — Prevent Duplicate Accounts
Description:
The system shall prevent account creation using an email address already in use.
Behavior:

Display error message
Provide link to Login
Provide link to Reset Password Maps to: BR‑ACCT‑04, UC‑ACCT‑03

FR‑ACCT‑05 — Create Account Record
Description:
Upon successful validation, the system shall create a new user account record.
Details:

Store hashed password
Store email in lowercase
Set account status = “Pending Verification”
Generate verification token Maps to: BR‑ACCT‑05, UC‑ACCT‑01

FR‑ACCT‑06 — Trigger Email Verification
Description:
The system shall send a verification email after account creation.
Details:

Email includes verification link with token
Token expires in 24 hours
Email is logged in Notification History Maps to: BR‑ACCT‑06, UC‑ACCT‑01

FR‑ACCT‑07 — Resend Verification Email
Description:
Users may request a new verification email.
Rules:

Limit: 3 resend attempts per hour
New token invalidates previous token
Display confirmation message Maps to: BR‑ACCT‑07, UC‑ACCT‑02

FR‑ACCT‑08 — Handle Expired or Invalid Tokens
Description:
The system shall detect invalid or expired verification tokens.
Behavior:

Display error message

Provide “Resend Verification Email” option

Log event for security monitoring Maps to: BR‑ACCT‑08, UC‑ACCT‑03

FR‑ACCT‑09 — Complete Verification
Description:
When a valid token is used, the system shall activate the user account.
Details:

Set account status = “Active”

Redirect user to onboarding

Trigger welcome notification Maps to: BR‑ACCT‑09, UC‑ACCT‑01

FR‑ACCT‑10 — Initialize User Profile
Description:
Upon account activation, the system shall create a default User Profile record.
Defaults:

Units: US Standard
Notifications: Enabled
Empty program list
Empty weight history Maps to: BR‑ACCT‑10, UC‑ACCT‑01

FR‑ACCT‑11 — Accessibility Requirements
Description:
The Create Account flow must comply with Accessibility FS.
Requirements:

All fields have labels
Errors announced via ARIA live region
Keyboard-only navigation supported
Focus moves to first error on submit Maps to: BR‑ACCT‑11, UC‑A11Y‑01 → UC‑A11Y‑10

FR‑ACCT‑12 — Security Requirements
Description:
The Create Account process must follow security best practices.
Rules:

Passwords hashed using PBKDF2 or bcrypt
Tokens must be single‑use
Rate limiting on account creation attempts
Log all suspicious activity

5. Non‑Functional Requirements

Must complete account creation in < 3 seconds
Must support high‑latency networks
Must support mobile and desktop
Must not expose internal error details
Must log all account creation events

6. Dependencies

Notification Service
Authentication Service
User Profile Service
Email Provider
Security Token Generator

7. Acceptance Criteria

All required fields validated
Duplicate emails blocked
Password policy enforced
Verification email sent
Token validation works
Account activates successfully
Profile initializes correctly
Errors are accessible and announced (These will be expanded into Test Cases later. )

8. Open Questions

Should we allow social login in future phases?
Should we enforce email domain restrictions?
Should we support phone‑based verification later