Add new position

```
curl -X POST http://localhost:8000/graphql \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer TOKEN" \
  -d '{
    "query": "mutation NewPosition($input: PositionInput!) { newPosition(input: $input) { id userId createdAt latitude longitude movingActivity } }",
    "variables": {
      "input": {
        "latitude": 44.502952,
        "longitude": 11.3114988,
        "movingActivity": "IN_VEHICLE"
      }
    }
  }'
```

1 files changed, 9 insertions, 1 deletions

diff --git a/src/graphql/types/position.rs b/src/graphql/types/position.rs
index 5807534..8610fcb 100644
--- a/src/graphql/types/position.rs
+++ b/src/graphql/types/position.rs
@@ -1,5 +1,5 @@
 use crate::{dates::GraphQLDate, graphql::types::jwt::Authentication, state::AppState};
-use async_graphql::{Context, Enum, Object};
+use async_graphql::{Context, Enum, InputObject, Object};
 use chrono::Utc;
 use serde::{Deserialize, Serialize};
 use std::error::Error;
@@ -78,6 +78,14 @@ pub struct Position {
     pub moving_activity: MovingActivity,
 }
 
+#[derive(InputObject)]
+/// Position input struct
+pub struct PositionInput {
+    pub latitude: f64,
+    pub longitude: f64,
+    pub moving_activity: MovingActivity,
+}
+
 #[Object]
 impl Position {
     async fn id(&self) -> i32 {