How to add dynamic where clause to php lighthouse graphql

I have implemented schema for fetching activities from the system and is working perfortly on fetching the whole list. I want to start passing user_id so as to filter based on the user or to filter by top 10 last week activities. My schema is;

The schema for activity.graphql

type ActivityActivity {
 id: ID!
 activity: String!
 user: User @belongsTo
 created_at: String!
 updated_at: String
 deleted_at: String
 createdBy: User @belongsTo
 updatedBy: User @belongsTo
 deletedBy: User @belongsTo
}

extend type Mutation {

createActivityActivity(
    id: ID 
    activity: String!
    user_id: Int!
    source_type: String!
    source_id: Int!
): ActivityActivity @create(model: "Modules\\Activity\\Entities\\Activity")

updateActivityActivity(
        id: ID!  
        activity: String
        user_id: Int 
        source_type: String
        source_id: Int
): ActivityActivity @update(model: "Modules\\Activity\\Entities\\Activity")

deleteActivityActivity(id: [ID!]!): [ActivityActivity!]! @delete(model: "Modules\\Activity\\Entities\\Activity")
}

extend type Query {
    activity_activity: [ActivityActivity!]! @paginate(model: "Modules\\Activity\\Entities\\Activity")
    find_activity_activity(id: Int! @eq): ActivityActivity @find(model: "Modules\\Activity\\Entities\\Activity")
}

extend type User {
activity: [ActivityActivity!]! @hasMany
}

via Chebli Mohamed