Add alerts

A payload for alert creation can be

```
{
  "query": "mutation NewAlert($input: AlertInput!) { newAlert(input: $input) { id createdAt level } }",
  "variables": {
    "input": {
      "points": [
        { "latitude": 40.73061, "longitude": -73.935242 },
        { "latitude": 40.741895, "longitude": -73.989308 },
        { "latitude": 40.712776, "longitude": -74.005974 },
        { "latitude": 40.73061, "longitude": -73.935242 },
      ],
      "level": "TWO"
    }
  }
}
```

1 files changed, 11 insertions, 1 deletions

diff --git a/src/graphql/query.rs b/src/graphql/query.rs
index c751543..36883e7 100644
--- a/src/graphql/query.rs
+++ b/src/graphql/query.rs
@@ -1,4 +1,4 @@
-use crate::graphql::types::{position, user};
+use crate::graphql::types::*;
 use async_graphql::{Context, Object};
 
 /// Query struct
@@ -43,4 +43,14 @@ impl Query {
     ) -> Result<Option<Vec<position::Position>>, String> {
         position::last_positions(ctx, moving_activity).await
     }
+
+    /// Returns all the positions
+    async fn alerts<'ctx>(
+        &self,
+        ctx: &Context<'ctx>,
+        #[graphql(desc = "Limit results")] limit: Option<i64>,
+        #[graphql(desc = "Offset results")] offset: Option<i64>,
+    ) -> Result<Option<Vec<alert::Alert>>, String> {
+        alert::get_alerts(ctx, limit, offset).await
+    }
 }