Dynamically changing the resources in the group using API's

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Hi ,

       We have a use case in which two groups are present :

       1. Team 1 (3 resources)

       2. Team 2(4 resources) 

       Through documentation we have seen that we could change the resources between the group by dragging it and placing it over the other group .

       Is there a possible way of changing the resources in the group using API's(preferably REST) .?

       This scenerio is created by taking into consideration that each group behaves as a single team First Group ( 3 member team / 3 resources ) and Second Group(4  member team /4 resources) . If one of the resource is not present on a particular day then  the resource of that  particular group needs to be added to another group  .We want to achieve this functionality using API's since the teams are dynamically changing using every day .