SDR Document for CRM SAAS Development

I need a comprehensive Software Development Requirements (SDR) document for a CRM SAAS platform. This document is crucial to guide our development team.

Key Areas to Highlight:
- User authentication and security
- Data management and storage
- Integration with other systems
- System flow and functional requirements

Diagrams/Flowcharts Required:
- System architecture diagrams
- Workflow diagrams
- Entity-relationship diagrams
- System flow diagrams

Ideal Skills and Experience:
- Experience in creating SDR documents for SAAS platforms
- Strong understanding of system architecture and data management
- Proficiency in creating detailed and clear diagrams/flowcharts
- Background in software development or project management is a plus