Make sure you have the Console enabled by looking in
Settings > Keyboard and mouse then click enable dev console and then done

Then use ~ to open it


Then you need to start a map of some kind using:
map <map name>

Then enable cheats via:
sv_cheats 1

• wars_giveresources <ResourceName> <Amount> <Player|optional> - Give resources
  
• wars_build_instant - build units instantly (ignoring build times)
  
• unitpanel - Show a panel for spawning units
  
• unit_create - Create an unit from the console.
  
• abilitypanel - Show a panel to execute abilities.
  
• wars_abi - Execute an ability from the console.
  
• playermodifiertool - Show a panel to modify some player instance data like the color.
  
• attributemodifiertool - Show a panel for modifying attributes of units.
  
• load_gamepackage - Load a game package.
  
• change_ownernumber - Change your owner number. Is used to indentify which units you
  
• can control.
  
• sv_unitlimit - Controls the maximum population per player.
  
• wars_setgamerules - Change the gamerules.

• wars_editor - Open tools for the flora editor and navigation mesh
  
• sv_fogofwar 0 - Disable fog of war
  
• noclip - Free fly mode

• wars_strategicai_enable - Enable CPU Player for specific player
  
• wars_strategicai_disable - Disable CPU Player for specific player
  
• wars_strategicai_debugprint - Prints debug information about a CPU player

• recast_build - Builds the navigation mesh
  
• recast_draw_navmesh - Visualizes the navigation mesh
  
• recast_draw_nodepth - Draws the navigation mesh with no depth. Can be useful if map geometry is overlapping the mesh, but if you have multiple layers this can look confusing.
  
• recast_draw_trimeshslope - Visualizes the map geometry used by the build process. Useful if the navigation mesh result does not match the expected result.
  
• recast_build_numthreads - Max number of threads used when building navigation meshes in parallel (restricted by the number of meshes to build).
  
• recast_loadmapmesh - Generates the map geometry used by the build process. recast_build will do this automatically, but can be useful if you only want to visualize the generated map geometry.

Thanks to ProgSys for listing commands in listed post