increaseCollateralAmount : User is not allowed to increase collateral freely.
For all the tree type of vault, a user is allowed to increase collateral only if the overall collateral value is higher than the margin value.\\nimo, this restriction may not be needed. anyway user is adding the collateral that could eventually save from liquidation.\\nProtocol will loose advantage due to this restriction.\\nCodes from lyra vault implementation :\\nLine 184\\n```\\n    require(colInUSD >= borrowMargin, "Liquidation margin not met!");\\n```\\n\\nFor synth - Refer here\\nFor velo - Refer here
Allow user add collateral freely.
User may not have the collateral all at once, but they can add like an EMI.\\nProtocol will loose the repayment anyway.\\nWhat is no one comes for liquidation - again this could lose.
```\\n    require(colInUSD >= borrowMargin, "Liquidation margin not met!");\\n```\\n